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An employee works at computer screens at the headquarters of Kaspersky Lab, a cyber-security firm, in Moscow, Russia, on Tuesday, Dec. 9, 2014. 'Hackers have become capable of carrying out very advanced attacks,' Kaspersky said. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images

An employee works at computer screens at the headquarters of Kaspersky Lab, a cyber-security firm, in Moscow, Russia, on Tuesday, Dec. 9, 2014. 'Hackers have become capable of carrying out very advanced attacks,' Kaspersky said. Photographer: Alexander Zemlianichenko Jr./Bloomberg via Getty Images